71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
import tarfile
|
|
import sys
|
|
|
|
|
|
def process_columns(line: list[str]) -> tuple[str, list[str]]:
|
|
match line:
|
|
case [name, h_prefix, nrbytes, flags]:
|
|
return (h_prefix, flags.lower().split(","))
|
|
case other:
|
|
raise Exception("Unsupported hashes.conf line format", other)
|
|
|
|
|
|
def find_tar_file(tar: tarfile.TarFile, requested_name: str):
|
|
"""Attempts to find a single file with given name in tarball."""
|
|
all_names = tar.getnames()
|
|
|
|
if requested_name in all_names:
|
|
return requested_name
|
|
|
|
requested_suffix = f"/{requested_name}"
|
|
candidate_names = [name for name in all_names if name.endswith(requested_suffix)]
|
|
match candidate_names:
|
|
case [real_name]:
|
|
return real_name
|
|
case other:
|
|
raise KeyError(
|
|
f"Could not locate a single {requested_name} in the contents of the tarball."
|
|
)
|
|
|
|
|
|
hashes_path = "lib/hashes.conf"
|
|
|
|
|
|
def main() -> None:
|
|
match sys.argv:
|
|
case [_name, src, enable_hashes, "--", *enabled_crypt_scheme_ids]:
|
|
pass
|
|
case other:
|
|
raise Exception(
|
|
"Incorrect number of arguments. Usage: check_passthru_matches.py <src> <enable_hashes> -- <enabled_crypt_scheme_ids...>"
|
|
)
|
|
|
|
with tarfile.open(src, "r") as tar:
|
|
real_hashes_path = find_tar_file(tar, hashes_path)
|
|
config = tar.extractfile(real_hashes_path).read().decode("utf-8")
|
|
|
|
formats = [
|
|
process_columns(columns)
|
|
for line in config.splitlines()
|
|
if not line.startswith("#") and len(columns := line.split()) > 0
|
|
]
|
|
expected_supported_formats = set(
|
|
prefix
|
|
for (prefix, flags) in formats
|
|
if enable_hashes in flags or enable_hashes == "all"
|
|
)
|
|
passthru_supported_schemes = set(
|
|
f"${scheme}$" for scheme in enabled_crypt_scheme_ids
|
|
)
|
|
|
|
assert (
|
|
len(expected_supported_formats - passthru_supported_schemes) == 0
|
|
), f"libxcrypt package enables the following crypt schemes that are not listed in passthru.enabledCryptSchemeIds: {expected_supported_formats - passthru_supported_schemes}"
|
|
assert (
|
|
len(passthru_supported_schemes - expected_supported_formats) == 0
|
|
), f"libxcrypt package lists the following crypt schemes in passthru.enabledCryptSchemeIds that are not supported: {passthru_supported_schemes - expected_supported_formats}"
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|